21791640

素因数分解:

$2^3\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{61}}^1\times {\mathrm{229}}^1$

素因数の和:317

約数の個数: 128

約数和(自身を含む): 71870400

約数和(自身を除く): 50078760

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 13, 15, 20, 24, 26, 30, 39, 40, 52, 60, 61, 65, 78, 104, 120, 122, 130, 156, 183, 195, 229, 244, 260, 305, 312, 366, 390, 458, 488, 520, 610, 687, 732, 780, 793, 915, 916, 1145, 1220, 1374, 1464, 1560, 1586, 1830, 1832, 2290, 2379, 2440, 2748, 2977, 3172, 3435, 3660, 3965, 4580, 4758, 5496, 5954, 6344, 6870, 7320, 7930, 8931, 9160, 9516, 11895, 11908, 13740, 13969, 14885, 15860, 17862, 19032, 23790, 23816, 27480, 27938, 29770, 31720, 35724, 41907, 44655, 47580, 55876, 59540, 69845, 71448, 83814, 89310, 95160, 111752, 119080, 139690, 167628, 178620, 181597, 209535, 279380, 335256, 357240, 363194, 419070, 544791, 558760, 726388, 838140, 907985, 1089582, 1452776, 1676280, 1815970, 2179164, 2723955, 3631940, 4358328, 5447910, 7263880, 10895820, 21791640]

約数ペア:

[(1, 21791640), (2, 10895820), (3, 7263880), (4, 5447910), (5, 4358328), (6, 3631940), (8, 2723955), (10, 2179164), (12, 1815970), (13, 1676280), (15, 1452776), (20, 1089582), (24, 907985), (26, 838140), (30, 726388), (39, 558760), (40, 544791), (52, 419070), (60, 363194), (61, 357240), (65, 335256), (78, 279380), (104, 209535), (120, 181597), (122, 178620), (130, 167628), (156, 139690), (183, 119080), (195, 111752), (229, 95160), (244, 89310), (260, 83814), (305, 71448), (312, 69845), (366, 59540), (390, 55876), (458, 47580), (488, 44655), (520, 41907), (610, 35724), (687, 31720), (732, 29770), (780, 27938), (793, 27480), (915, 23816), (916, 23790), (1145, 19032), (1220, 17862), (1374, 15860), (1464, 14885), (1560, 13969), (1586, 13740), (1830, 11908), (1832, 11895), (2290, 9516), (2379, 9160), (2440, 8931), (2748, 7930), (2977, 7320), (3172, 6870), (3435, 6344), (3660, 5954), (3965, 5496), (4580, 4758)]