21196420

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{503}}^1$

素因数の和:569

約数の個数: 72

約数和(自身を含む): 53089344

約数和(自身を除く): 31892924

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 43, 49, 70, 86, 98, 140, 172, 196, 215, 245, 301, 430, 490, 503, 602, 860, 980, 1006, 1204, 1505, 2012, 2107, 2515, 3010, 3521, 4214, 5030, 6020, 7042, 8428, 10060, 10535, 14084, 17605, 21070, 21629, 24647, 35210, 42140, 43258, 49294, 70420, 86516, 98588, 108145, 123235, 151403, 216290, 246470, 302806, 432580, 492940, 605612, 757015, 1059821, 1514030, 2119642, 3028060, 4239284, 5299105, 10598210, 21196420]

約数ペア:

[(1, 21196420), (2, 10598210), (4, 5299105), (5, 4239284), (7, 3028060), (10, 2119642), (14, 1514030), (20, 1059821), (28, 757015), (35, 605612), (43, 492940), (49, 432580), (70, 302806), (86, 246470), (98, 216290), (140, 151403), (172, 123235), (196, 108145), (215, 98588), (245, 86516), (301, 70420), (430, 49294), (490, 43258), (503, 42140), (602, 35210), (860, 24647), (980, 21629), (1006, 21070), (1204, 17605), (1505, 14084), (2012, 10535), (2107, 10060), (2515, 8428), (3010, 7042), (3521, 6020), (4214, 5030)]