19881420

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{359}}^1$

素因数の和:455

約数の個数: 96

約数和(自身を含む): 60963840

約数和(自身を除く): 41082420

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 13, 15, 20, 26, 30, 39, 52, 60, 65, 71, 78, 130, 142, 156, 195, 213, 260, 284, 355, 359, 390, 426, 710, 718, 780, 852, 923, 1065, 1077, 1420, 1436, 1795, 1846, 2130, 2154, 2769, 3590, 3692, 4260, 4308, 4615, 4667, 5385, 5538, 7180, 9230, 9334, 10770, 11076, 13845, 14001, 18460, 18668, 21540, 23335, 25489, 27690, 28002, 46670, 50978, 55380, 56004, 70005, 76467, 93340, 101956, 127445, 140010, 152934, 254890, 280020, 305868, 331357, 382335, 509780, 662714, 764670, 994071, 1325428, 1529340, 1656785, 1988142, 3313570, 3976284, 4970355, 6627140, 9940710, 19881420]

約数ペア:

[(1, 19881420), (2, 9940710), (3, 6627140), (4, 4970355), (5, 3976284), (6, 3313570), (10, 1988142), (12, 1656785), (13, 1529340), (15, 1325428), (20, 994071), (26, 764670), (30, 662714), (39, 509780), (52, 382335), (60, 331357), (65, 305868), (71, 280020), (78, 254890), (130, 152934), (142, 140010), (156, 127445), (195, 101956), (213, 93340), (260, 76467), (284, 70005), (355, 56004), (359, 55380), (390, 50978), (426, 46670), (710, 28002), (718, 27690), (780, 25489), (852, 23335), (923, 21540), (1065, 18668), (1077, 18460), (1420, 14001), (1436, 13845), (1795, 11076), (1846, 10770), (2130, 9334), (2154, 9230), (2769, 7180), (3590, 5538), (3692, 5385), (4260, 4667), (4308, 4615)]