21323440

素因数分解:

$2^4\times 5^1\times {\mathrm{17}}^1\times {\mathrm{15679}}^1$

素因数の和:15709

約数の個数: 40

約数和(自身を含む): 52496640

約数和(自身を除く): 31173200

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 1360, 15679, 31358, 62716, 78395, 125432, 156790, 250864, 266543, 313580, 533086, 627160, 1066172, 1254320, 1332715, 2132344, 2665430, 4264688, 5330860, 10661720, 21323440]

約数ペア:

[(1, 21323440), (2, 10661720), (4, 5330860), (5, 4264688), (8, 2665430), (10, 2132344), (16, 1332715), (17, 1254320), (20, 1066172), (34, 627160), (40, 533086), (68, 313580), (80, 266543), (85, 250864), (136, 156790), (170, 125432), (272, 78395), (340, 62716), (680, 31358), (1360, 15679)]