21761870

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{229}}^1$

素因数の和:309

約数の個数: 64

約数和(自身を含む): 45904320

約数和(自身を除く): 24142450

約数列:

[1, 2, 5, 10, 13, 17, 26, 34, 43, 65, 85, 86, 130, 170, 215, 221, 229, 430, 442, 458, 559, 731, 1105, 1118, 1145, 1462, 2210, 2290, 2795, 2977, 3655, 3893, 5590, 5954, 7310, 7786, 9503, 9847, 14885, 19006, 19465, 19694, 29770, 38930, 47515, 49235, 50609, 95030, 98470, 101218, 128011, 167399, 253045, 256022, 334798, 506090, 640055, 836995, 1280110, 1673990, 2176187, 4352374, 10880935, 21761870]

約数ペア:

[(1, 21761870), (2, 10880935), (5, 4352374), (10, 2176187), (13, 1673990), (17, 1280110), (26, 836995), (34, 640055), (43, 506090), (65, 334798), (85, 256022), (86, 253045), (130, 167399), (170, 128011), (215, 101218), (221, 98470), (229, 95030), (430, 50609), (442, 49235), (458, 47515), (559, 38930), (731, 29770), (1105, 19694), (1118, 19465), (1145, 19006), (1462, 14885), (2210, 9847), (2290, 9503), (2795, 7786), (2977, 7310), (3655, 5954), (3893, 5590)]