21504990

素因数分解:

$2^1\times 3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{823}}^1$

素因数の和:913

約数の個数: 64

約数和(自身を含む): 56480256

約数和(自身を除く): 34975266

約数列:

[1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 67, 78, 130, 134, 195, 201, 335, 390, 402, 670, 823, 871, 1005, 1646, 1742, 2010, 2469, 2613, 4115, 4355, 4938, 5226, 8230, 8710, 10699, 12345, 13065, 21398, 24690, 26130, 32097, 53495, 55141, 64194, 106990, 110282, 160485, 165423, 275705, 320970, 330846, 551410, 716833, 827115, 1433666, 1654230, 2150499, 3584165, 4300998, 7168330, 10752495, 21504990]

約数ペア:

[(1, 21504990), (2, 10752495), (3, 7168330), (5, 4300998), (6, 3584165), (10, 2150499), (13, 1654230), (15, 1433666), (26, 827115), (30, 716833), (39, 551410), (65, 330846), (67, 320970), (78, 275705), (130, 165423), (134, 160485), (195, 110282), (201, 106990), (335, 64194), (390, 55141), (402, 53495), (670, 32097), (823, 26130), (871, 24690), (1005, 21398), (1646, 13065), (1742, 12345), (2010, 10699), (2469, 8710), (2613, 8230), (4115, 5226), (4355, 4938)]