642777980

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^2\times {\mathrm{19}}^1\times {\mathrm{10009}}^1$

素因数の和:10063

約数の個数: 72

約数和(自身を含む): 1538737200

約数和(自身を除く): 895959220

約数列:

[1, 2, 4, 5, 10, 13, 19, 20, 26, 38, 52, 65, 76, 95, 130, 169, 190, 247, 260, 338, 380, 494, 676, 845, 988, 1235, 1690, 2470, 3211, 3380, 4940, 6422, 10009, 12844, 16055, 20018, 32110, 40036, 50045, 64220, 100090, 130117, 190171, 200180, 260234, 380342, 520468, 650585, 760684, 950855, 1301170, 1691521, 1901710, 2472223, 2602340, 3383042, 3803420, 4944446, 6766084, 8457605, 9888892, 12361115, 16915210, 24722230, 32138899, 33830420, 49444460, 64277798, 128555596, 160694495, 321388990, 642777980]

約数ペア:

[(1, 642777980), (2, 321388990), (4, 160694495), (5, 128555596), (10, 64277798), (13, 49444460), (19, 33830420), (20, 32138899), (26, 24722230), (38, 16915210), (52, 12361115), (65, 9888892), (76, 8457605), (95, 6766084), (130, 4944446), (169, 3803420), (190, 3383042), (247, 2602340), (260, 2472223), (338, 1901710), (380, 1691521), (494, 1301170), (676, 950855), (845, 760684), (988, 650585), (1235, 520468), (1690, 380342), (2470, 260234), (3211, 200180), (3380, 190171), (4940, 130117), (6422, 100090), (10009, 64220), (12844, 50045), (16055, 40036), (20018, 32110)]