21268260

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{149}}^1$

素因数の和:238

約数の個数: 144

約数和(自身を含む): 71089200

約数和(自身を除く): 49820940

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 13, 15, 18, 20, 26, 30, 36, 39, 45, 52, 60, 61, 65, 78, 90, 117, 122, 130, 149, 156, 180, 183, 195, 234, 244, 260, 298, 305, 366, 390, 447, 468, 549, 585, 596, 610, 732, 745, 780, 793, 894, 915, 1098, 1170, 1220, 1341, 1490, 1586, 1788, 1830, 1937, 2196, 2235, 2340, 2379, 2682, 2745, 2980, 3172, 3660, 3874, 3965, 4470, 4758, 5364, 5490, 5811, 6705, 7137, 7748, 7930, 8940, 9089, 9516, 9685, 10980, 11622, 11895, 13410, 14274, 15860, 17433, 18178, 19370, 23244, 23790, 26820, 27267, 28548, 29055, 34866, 35685, 36356, 38740, 45445, 47580, 54534, 58110, 69732, 71370, 81801, 87165, 90890, 109068, 116220, 118157, 136335, 142740, 163602, 174330, 181780, 236314, 272670, 327204, 348660, 354471, 409005, 472628, 545340, 590785, 708942, 818010, 1063413, 1181570, 1417884, 1636020, 1772355, 2126826, 2363140, 3544710, 4253652, 5317065, 7089420, 10634130, 21268260]

約数ペア:

[(1, 21268260), (2, 10634130), (3, 7089420), (4, 5317065), (5, 4253652), (6, 3544710), (9, 2363140), (10, 2126826), (12, 1772355), (13, 1636020), (15, 1417884), (18, 1181570), (20, 1063413), (26, 818010), (30, 708942), (36, 590785), (39, 545340), (45, 472628), (52, 409005), (60, 354471), (61, 348660), (65, 327204), (78, 272670), (90, 236314), (117, 181780), (122, 174330), (130, 163602), (149, 142740), (156, 136335), (180, 118157), (183, 116220), (195, 109068), (234, 90890), (244, 87165), (260, 81801), (298, 71370), (305, 69732), (366, 58110), (390, 54534), (447, 47580), (468, 45445), (549, 38740), (585, 36356), (596, 35685), (610, 34866), (732, 29055), (745, 28548), (780, 27267), (793, 26820), (894, 23790), (915, 23244), (1098, 19370), (1170, 18178), (1220, 17433), (1341, 15860), (1490, 14274), (1586, 13410), (1788, 11895), (1830, 11622), (1937, 10980), (2196, 9685), (2235, 9516), (2340, 9089), (2379, 8940), (2682, 7930), (2745, 7748), (2980, 7137), (3172, 6705), (3660, 5811), (3874, 5490), (3965, 5364), (4470, 4758)]