20639280

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{3739}}^1$

素因数の和:3778

約数の個数: 80

約数和(自身を含む): 66781440

約数和(自身を除く): 46142160

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 23, 24, 30, 40, 46, 48, 60, 69, 80, 92, 115, 120, 138, 184, 230, 240, 276, 345, 368, 460, 552, 690, 920, 1104, 1380, 1840, 2760, 3739, 5520, 7478, 11217, 14956, 18695, 22434, 29912, 37390, 44868, 56085, 59824, 74780, 85997, 89736, 112170, 149560, 171994, 179472, 224340, 257991, 299120, 343988, 429985, 448680, 515982, 687976, 859970, 897360, 1031964, 1289955, 1375952, 1719940, 2063928, 2579910, 3439880, 4127856, 5159820, 6879760, 10319640, 20639280]

約数ペア:

[(1, 20639280), (2, 10319640), (3, 6879760), (4, 5159820), (5, 4127856), (6, 3439880), (8, 2579910), (10, 2063928), (12, 1719940), (15, 1375952), (16, 1289955), (20, 1031964), (23, 897360), (24, 859970), (30, 687976), (40, 515982), (46, 448680), (48, 429985), (60, 343988), (69, 299120), (80, 257991), (92, 224340), (115, 179472), (120, 171994), (138, 149560), (184, 112170), (230, 89736), (240, 85997), (276, 74780), (345, 59824), (368, 56085), (460, 44868), (552, 37390), (690, 29912), (920, 22434), (1104, 18695), (1380, 14956), (1840, 11217), (2760, 7478), (3739, 5520)]