20509840

素因数分解:

$2^4\times 5^1\times {\mathrm{13}}^2\times {\mathrm{37}}^1\times {\mathrm{41}}^1$

素因数の和:117

約数の個数: 120

約数和(自身を含む): 54324648

約数和(自身を除く): 33814808

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 37, 40, 41, 52, 65, 74, 80, 82, 104, 130, 148, 164, 169, 185, 205, 208, 260, 296, 328, 338, 370, 410, 481, 520, 533, 592, 656, 676, 740, 820, 845, 962, 1040, 1066, 1352, 1480, 1517, 1640, 1690, 1924, 2132, 2405, 2665, 2704, 2960, 3034, 3280, 3380, 3848, 4264, 4810, 5330, 6068, 6253, 6760, 6929, 7585, 7696, 8528, 9620, 10660, 12136, 12506, 13520, 13858, 15170, 19240, 19721, 21320, 24272, 25012, 27716, 30340, 31265, 34645, 38480, 39442, 42640, 50024, 55432, 60680, 62530, 69290, 78884, 98605, 100048, 110864, 121360, 125060, 138580, 157768, 197210, 250120, 256373, 277160, 315536, 394420, 500240, 512746, 554320, 788840, 1025492, 1281865, 1577680, 2050984, 2563730, 4101968, 5127460, 10254920, 20509840]

約数ペア:

[(1, 20509840), (2, 10254920), (4, 5127460), (5, 4101968), (8, 2563730), (10, 2050984), (13, 1577680), (16, 1281865), (20, 1025492), (26, 788840), (37, 554320), (40, 512746), (41, 500240), (52, 394420), (65, 315536), (74, 277160), (80, 256373), (82, 250120), (104, 197210), (130, 157768), (148, 138580), (164, 125060), (169, 121360), (185, 110864), (205, 100048), (208, 98605), (260, 78884), (296, 69290), (328, 62530), (338, 60680), (370, 55432), (410, 50024), (481, 42640), (520, 39442), (533, 38480), (592, 34645), (656, 31265), (676, 30340), (740, 27716), (820, 25012), (845, 24272), (962, 21320), (1040, 19721), (1066, 19240), (1352, 15170), (1480, 13858), (1517, 13520), (1640, 12506), (1690, 12136), (1924, 10660), (2132, 9620), (2405, 8528), (2665, 7696), (2704, 7585), (2960, 6929), (3034, 6760), (3280, 6253), (3380, 6068), (3848, 5330), (4264, 4810)]