21372910

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{509}}^1$

素因数の和:565

約数の個数: 64

約数和(自身を含む): 46267200

約数和(自身を除く): 24894290

約数列:

[1, 2, 5, 10, 13, 17, 19, 26, 34, 38, 65, 85, 95, 130, 170, 190, 221, 247, 323, 442, 494, 509, 646, 1018, 1105, 1235, 1615, 2210, 2470, 2545, 3230, 4199, 5090, 6617, 8398, 8653, 9671, 13234, 17306, 19342, 20995, 33085, 41990, 43265, 48355, 66170, 86530, 96710, 112489, 125723, 164407, 224978, 251446, 328814, 562445, 628615, 822035, 1124890, 1257230, 1644070, 2137291, 4274582, 10686455, 21372910]

約数ペア:

[(1, 21372910), (2, 10686455), (5, 4274582), (10, 2137291), (13, 1644070), (17, 1257230), (19, 1124890), (26, 822035), (34, 628615), (38, 562445), (65, 328814), (85, 251446), (95, 224978), (130, 164407), (170, 125723), (190, 112489), (221, 96710), (247, 86530), (323, 66170), (442, 48355), (494, 43265), (509, 41990), (646, 33085), (1018, 20995), (1105, 19342), (1235, 17306), (1615, 13234), (2210, 9671), (2470, 8653), (2545, 8398), (3230, 6617), (4199, 5090)]