21357420

素因数分解:

$2^2\times 3^1\times 5^1\times 7^1\times {\mathrm{211}}^1\times {\mathrm{241}}^1$

素因数の和:471

約数の個数: 96

約数和(自身を含む): 68952576

約数和(自身を除く): 47595156

約数列:

[1, 2, 3, 4, 5, 6, 7, 10, 12, 14, 15, 20, 21, 28, 30, 35, 42, 60, 70, 84, 105, 140, 210, 211, 241, 420, 422, 482, 633, 723, 844, 964, 1055, 1205, 1266, 1446, 1477, 1687, 2110, 2410, 2532, 2892, 2954, 3165, 3374, 3615, 4220, 4431, 4820, 5061, 5908, 6330, 6748, 7230, 7385, 8435, 8862, 10122, 12660, 14460, 14770, 16870, 17724, 20244, 22155, 25305, 29540, 33740, 44310, 50610, 50851, 88620, 101220, 101702, 152553, 203404, 254255, 305106, 355957, 508510, 610212, 711914, 762765, 1017020, 1067871, 1423828, 1525530, 1779785, 2135742, 3051060, 3559570, 4271484, 5339355, 7119140, 10678710, 21357420]

約数ペア:

[(1, 21357420), (2, 10678710), (3, 7119140), (4, 5339355), (5, 4271484), (6, 3559570), (7, 3051060), (10, 2135742), (12, 1779785), (14, 1525530), (15, 1423828), (20, 1067871), (21, 1017020), (28, 762765), (30, 711914), (35, 610212), (42, 508510), (60, 355957), (70, 305106), (84, 254255), (105, 203404), (140, 152553), (210, 101702), (211, 101220), (241, 88620), (420, 50851), (422, 50610), (482, 44310), (633, 33740), (723, 29540), (844, 25305), (964, 22155), (1055, 20244), (1205, 17724), (1266, 16870), (1446, 14770), (1477, 14460), (1687, 12660), (2110, 10122), (2410, 8862), (2532, 8435), (2892, 7385), (2954, 7230), (3165, 6748), (3374, 6330), (3615, 5908), (4220, 5061), (4431, 4820)]