407969920

素因数分解:

$2^7\times 5^1\times {\mathrm{31}}^1\times {\mathrm{20563}}^1$

素因数の和:20613

約数の個数: 64

約数和(自身を含む): 1006813440

約数和(自身を除く): 598843520

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 31, 32, 40, 62, 64, 80, 124, 128, 155, 160, 248, 310, 320, 496, 620, 640, 992, 1240, 1984, 2480, 3968, 4960, 9920, 19840, 20563, 41126, 82252, 102815, 164504, 205630, 329008, 411260, 637453, 658016, 822520, 1274906, 1316032, 1645040, 2549812, 2632064, 3187265, 3290080, 5099624, 6374530, 6580160, 10199248, 12749060, 13160320, 20398496, 25498120, 40796992, 50996240, 81593984, 101992480, 203984960, 407969920]

約数ペア:

[(1, 407969920), (2, 203984960), (4, 101992480), (5, 81593984), (8, 50996240), (10, 40796992), (16, 25498120), (20, 20398496), (31, 13160320), (32, 12749060), (40, 10199248), (62, 6580160), (64, 6374530), (80, 5099624), (124, 3290080), (128, 3187265), (155, 2632064), (160, 2549812), (248, 1645040), (310, 1316032), (320, 1274906), (496, 822520), (620, 658016), (640, 637453), (992, 411260), (1240, 329008), (1984, 205630), (2480, 164504), (3968, 102815), (4960, 82252), (9920, 41126), (19840, 20563)]