20996880

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{89}}^1\times {\mathrm{983}}^1$

素因数の和:1088

約数の個数: 80

約数和(自身を含む): 65888640

約数和(自身を除く): 44891760

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 89, 120, 178, 240, 267, 356, 445, 534, 712, 890, 983, 1068, 1335, 1424, 1780, 1966, 2136, 2670, 2949, 3560, 3932, 4272, 4915, 5340, 5898, 7120, 7864, 9830, 10680, 11796, 14745, 15728, 19660, 21360, 23592, 29490, 39320, 47184, 58980, 78640, 87487, 117960, 174974, 235920, 262461, 349948, 437435, 524922, 699896, 874870, 1049844, 1312305, 1399792, 1749740, 2099688, 2624610, 3499480, 4199376, 5249220, 6998960, 10498440, 20996880]

約数ペア:

[(1, 20996880), (2, 10498440), (3, 6998960), (4, 5249220), (5, 4199376), (6, 3499480), (8, 2624610), (10, 2099688), (12, 1749740), (15, 1399792), (16, 1312305), (20, 1049844), (24, 874870), (30, 699896), (40, 524922), (48, 437435), (60, 349948), (80, 262461), (89, 235920), (120, 174974), (178, 117960), (240, 87487), (267, 78640), (356, 58980), (445, 47184), (534, 39320), (712, 29490), (890, 23592), (983, 21360), (1068, 19660), (1335, 15728), (1424, 14745), (1780, 11796), (1966, 10680), (2136, 9830), (2670, 7864), (2949, 7120), (3560, 5898), (3932, 5340), (4272, 4915)]