21665900

素因数分解:

$2^2\times 5^2\times {\mathrm{29}}^1\times {\mathrm{31}}^1\times {\mathrm{241}}^1$

素因数の和:315

約数の個数: 72

約数和(自身を含む): 50413440

約数和(自身を除く): 28747540

約数列:

[1, 2, 4, 5, 10, 20, 25, 29, 31, 50, 58, 62, 100, 116, 124, 145, 155, 241, 290, 310, 482, 580, 620, 725, 775, 899, 964, 1205, 1450, 1550, 1798, 2410, 2900, 3100, 3596, 4495, 4820, 6025, 6989, 7471, 8990, 12050, 13978, 14942, 17980, 22475, 24100, 27956, 29884, 34945, 37355, 44950, 69890, 74710, 89900, 139780, 149420, 174725, 186775, 216659, 349450, 373550, 433318, 698900, 747100, 866636, 1083295, 2166590, 4333180, 5416475, 10832950, 21665900]

約数ペア:

[(1, 21665900), (2, 10832950), (4, 5416475), (5, 4333180), (10, 2166590), (20, 1083295), (25, 866636), (29, 747100), (31, 698900), (50, 433318), (58, 373550), (62, 349450), (100, 216659), (116, 186775), (124, 174725), (145, 149420), (155, 139780), (241, 89900), (290, 74710), (310, 69890), (482, 44950), (580, 37355), (620, 34945), (725, 29884), (775, 27956), (899, 24100), (964, 22475), (1205, 17980), (1450, 14942), (1550, 13978), (1798, 12050), (2410, 8990), (2900, 7471), (3100, 6989), (3596, 6025), (4495, 4820)]