20284400

素因数分解:

$2^4\times 5^2\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{157}}^1$

素因数の和:211

約数の個数: 120

約数和(自身を含む): 54661680

約数和(自身を除く): 34377280

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 19, 20, 25, 34, 38, 40, 50, 68, 76, 80, 85, 95, 100, 136, 152, 157, 170, 190, 200, 272, 304, 314, 323, 340, 380, 400, 425, 475, 628, 646, 680, 760, 785, 850, 950, 1256, 1292, 1360, 1520, 1570, 1615, 1700, 1900, 2512, 2584, 2669, 2983, 3140, 3230, 3400, 3800, 3925, 5168, 5338, 5966, 6280, 6460, 6800, 7600, 7850, 8075, 10676, 11932, 12560, 12920, 13345, 14915, 15700, 16150, 21352, 23864, 25840, 26690, 29830, 31400, 32300, 42704, 47728, 50711, 53380, 59660, 62800, 64600, 66725, 74575, 101422, 106760, 119320, 129200, 133450, 149150, 202844, 213520, 238640, 253555, 266900, 298300, 405688, 507110, 533800, 596600, 811376, 1014220, 1067600, 1193200, 1267775, 2028440, 2535550, 4056880, 5071100, 10142200, 20284400]

約数ペア:

[(1, 20284400), (2, 10142200), (4, 5071100), (5, 4056880), (8, 2535550), (10, 2028440), (16, 1267775), (17, 1193200), (19, 1067600), (20, 1014220), (25, 811376), (34, 596600), (38, 533800), (40, 507110), (50, 405688), (68, 298300), (76, 266900), (80, 253555), (85, 238640), (95, 213520), (100, 202844), (136, 149150), (152, 133450), (157, 129200), (170, 119320), (190, 106760), (200, 101422), (272, 74575), (304, 66725), (314, 64600), (323, 62800), (340, 59660), (380, 53380), (400, 50711), (425, 47728), (475, 42704), (628, 32300), (646, 31400), (680, 29830), (760, 26690), (785, 25840), (850, 23864), (950, 21352), (1256, 16150), (1292, 15700), (1360, 14915), (1520, 13345), (1570, 12920), (1615, 12560), (1700, 11932), (1900, 10676), (2512, 8075), (2584, 7850), (2669, 7600), (2983, 6800), (3140, 6460), (3230, 6280), (3400, 5966), (3800, 5338), (3925, 5168)]