21917505

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{101}}^1$

素因数の和:186

約数の個数: 64

約数和(自身を含む): 40186368

約数和(自身を除く): 18268863

約数列:

[1, 3, 5, 15, 17, 23, 37, 51, 69, 85, 101, 111, 115, 185, 255, 303, 345, 391, 505, 555, 629, 851, 1173, 1515, 1717, 1887, 1955, 2323, 2553, 3145, 3737, 4255, 5151, 5865, 6969, 8585, 9435, 11211, 11615, 12765, 14467, 18685, 25755, 34845, 39491, 43401, 56055, 63529, 72335, 85951, 118473, 190587, 197455, 217005, 257853, 317645, 429755, 592365, 952935, 1289265, 1461167, 4383501, 7305835, 21917505]

約数ペア:

[(1, 21917505), (3, 7305835), (5, 4383501), (15, 1461167), (17, 1289265), (23, 952935), (37, 592365), (51, 429755), (69, 317645), (85, 257853), (101, 217005), (111, 197455), (115, 190587), (185, 118473), (255, 85951), (303, 72335), (345, 63529), (391, 56055), (505, 43401), (555, 39491), (629, 34845), (851, 25755), (1173, 18685), (1515, 14467), (1717, 12765), (1887, 11615), (1955, 11211), (2323, 9435), (2553, 8585), (3145, 6969), (3737, 5865), (4255, 5151)]