21978450

素因数分解:

$2^1\times 3^2\times 5^2\times {\mathrm{13}}^2\times {\mathrm{17}}^2$

素因数の和:78

約数の個数: 162

約数和(自身を含む): 67922829

約数和(自身を除く): 45944379

約数列:

[1, 2, 3, 5, 6, 9, 10, 13, 15, 17, 18, 25, 26, 30, 34, 39, 45, 50, 51, 65, 75, 78, 85, 90, 102, 117, 130, 150, 153, 169, 170, 195, 221, 225, 234, 255, 289, 306, 325, 338, 390, 425, 442, 450, 507, 510, 578, 585, 650, 663, 765, 845, 850, 867, 975, 1014, 1105, 1170, 1275, 1326, 1445, 1521, 1530, 1690, 1734, 1950, 1989, 2210, 2535, 2550, 2601, 2873, 2890, 2925, 3042, 3315, 3757, 3825, 3978, 4225, 4335, 5070, 5202, 5525, 5746, 5850, 6630, 7225, 7514, 7605, 7650, 8450, 8619, 8670, 9945, 11050, 11271, 12675, 13005, 14365, 14450, 15210, 16575, 17238, 18785, 19890, 21675, 22542, 25350, 25857, 26010, 28730, 33150, 33813, 37570, 38025, 43095, 43350, 48841, 49725, 51714, 56355, 65025, 67626, 71825, 76050, 86190, 93925, 97682, 99450, 112710, 129285, 130050, 143650, 146523, 169065, 187850, 215475, 244205, 258570, 281775, 293046, 338130, 430950, 439569, 488410, 563550, 646425, 732615, 845325, 879138, 1221025, 1292850, 1465230, 1690650, 2197845, 2442050, 3663075, 4395690, 7326150, 10989225, 21978450]

約数ペア:

[(1, 21978450), (2, 10989225), (3, 7326150), (5, 4395690), (6, 3663075), (9, 2442050), (10, 2197845), (13, 1690650), (15, 1465230), (17, 1292850), (18, 1221025), (25, 879138), (26, 845325), (30, 732615), (34, 646425), (39, 563550), (45, 488410), (50, 439569), (51, 430950), (65, 338130), (75, 293046), (78, 281775), (85, 258570), (90, 244205), (102, 215475), (117, 187850), (130, 169065), (150, 146523), (153, 143650), (169, 130050), (170, 129285), (195, 112710), (221, 99450), (225, 97682), (234, 93925), (255, 86190), (289, 76050), (306, 71825), (325, 67626), (338, 65025), (390, 56355), (425, 51714), (442, 49725), (450, 48841), (507, 43350), (510, 43095), (578, 38025), (585, 37570), (650, 33813), (663, 33150), (765, 28730), (845, 26010), (850, 25857), (867, 25350), (975, 22542), (1014, 21675), (1105, 19890), (1170, 18785), (1275, 17238), (1326, 16575), (1445, 15210), (1521, 14450), (1530, 14365), (1690, 13005), (1734, 12675), (1950, 11271), (1989, 11050), (2210, 9945), (2535, 8670), (2550, 8619), (2601, 8450), (2873, 7650), (2890, 7605), (2925, 7514), (3042, 7225), (3315, 6630), (3757, 5850), (3825, 5746), (3978, 5525), (4225, 5202), (4335, 5070)]