21985860

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{397}}^1$

素因数の和:493

約数の個数: 96

約数和(自身を含む): 67398912

約数和(自身を除く): 45413052

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, 390, 397, 426, 710, 780, 794, 852, 923, 1065, 1191, 1420, 1588, 1846, 1985, 2130, 2382, 2769, 3692, 3970, 4260, 4615, 4764, 5161, 5538, 5955, 7940, 9230, 10322, 11076, 11910, 13845, 15483, 18460, 20644, 23820, 25805, 27690, 28187, 30966, 51610, 55380, 56374, 61932, 77415, 84561, 103220, 112748, 140935, 154830, 169122, 281870, 309660, 338244, 366431, 422805, 563740, 732862, 845610, 1099293, 1465724, 1691220, 1832155, 2198586, 3664310, 4397172, 5496465, 7328620, 10992930, 21985860]

約数ペア:

[(1, 21985860), (2, 10992930), (3, 7328620), (4, 5496465), (5, 4397172), (6, 3664310), (10, 2198586), (12, 1832155), (13, 1691220), (15, 1465724), (20, 1099293), (26, 845610), (30, 732862), (39, 563740), (52, 422805), (60, 366431), (65, 338244), (71, 309660), (78, 281870), (130, 169122), (142, 154830), (156, 140935), (195, 112748), (213, 103220), (260, 84561), (284, 77415), (355, 61932), (390, 56374), (397, 55380), (426, 51610), (710, 30966), (780, 28187), (794, 27690), (852, 25805), (923, 23820), (1065, 20644), (1191, 18460), (1420, 15483), (1588, 13845), (1846, 11910), (1985, 11076), (2130, 10322), (2382, 9230), (2769, 7940), (3692, 5955), (3970, 5538), (4260, 5161), (4615, 4764)]