28809880

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{1597}}^1$

素因数の和:1660

約数の個数: 64

約数和(自身を含む): 72485280

約数和(自身を除く): 43675400

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 41, 44, 55, 82, 88, 110, 164, 205, 220, 328, 410, 440, 451, 820, 902, 1597, 1640, 1804, 2255, 3194, 3608, 4510, 6388, 7985, 9020, 12776, 15970, 17567, 18040, 31940, 35134, 63880, 65477, 70268, 87835, 130954, 140536, 175670, 261908, 327385, 351340, 523816, 654770, 702680, 720247, 1309540, 1440494, 2619080, 2880988, 3601235, 5761976, 7202470, 14404940, 28809880]

約数ペア:

[(1, 28809880), (2, 14404940), (4, 7202470), (5, 5761976), (8, 3601235), (10, 2880988), (11, 2619080), (20, 1440494), (22, 1309540), (40, 720247), (41, 702680), (44, 654770), (55, 523816), (82, 351340), (88, 327385), (110, 261908), (164, 175670), (205, 140536), (220, 130954), (328, 87835), (410, 70268), (440, 65477), (451, 63880), (820, 35134), (902, 31940), (1597, 18040), (1640, 17567), (1804, 15970), (2255, 12776), (3194, 9020), (3608, 7985), (4510, 6388)]