21000610

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{131}}^1$

素因数の和:219

約数の個数: 64

約数和(自身を含む): 43110144

約数和(自身を除く): 22109534

約数列:

[1, 2, 5, 10, 17, 23, 34, 41, 46, 82, 85, 115, 131, 170, 205, 230, 262, 391, 410, 655, 697, 782, 943, 1310, 1394, 1886, 1955, 2227, 3013, 3485, 3910, 4454, 4715, 5371, 6026, 6970, 9430, 10742, 11135, 15065, 16031, 22270, 26855, 30130, 32062, 51221, 53710, 80155, 91307, 102442, 123533, 160310, 182614, 247066, 256105, 456535, 512210, 617665, 913070, 1235330, 2100061, 4200122, 10500305, 21000610]

約数ペア:

[(1, 21000610), (2, 10500305), (5, 4200122), (10, 2100061), (17, 1235330), (23, 913070), (34, 617665), (41, 512210), (46, 456535), (82, 256105), (85, 247066), (115, 182614), (131, 160310), (170, 123533), (205, 102442), (230, 91307), (262, 80155), (391, 53710), (410, 51221), (655, 32062), (697, 30130), (782, 26855), (943, 22270), (1310, 16031), (1394, 15065), (1886, 11135), (1955, 10742), (2227, 9430), (3013, 6970), (3485, 6026), (3910, 5371), (4454, 4715)]