18944540

素因数分解:

$2^2\times 5^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{367}}^1$

素因数の和:494

約数の個数: 48

約数和(自身を含む): 41731200

約数和(自身を除く): 22786660

約数列:

[1, 2, 4, 5, 10, 20, 29, 58, 89, 116, 145, 178, 290, 356, 367, 445, 580, 734, 890, 1468, 1780, 1835, 2581, 3670, 5162, 7340, 10324, 10643, 12905, 21286, 25810, 32663, 42572, 51620, 53215, 65326, 106430, 130652, 163315, 212860, 326630, 653260, 947227, 1894454, 3788908, 4736135, 9472270, 18944540]

約数ペア:

[(1, 18944540), (2, 9472270), (4, 4736135), (5, 3788908), (10, 1894454), (20, 947227), (29, 653260), (58, 326630), (89, 212860), (116, 163315), (145, 130652), (178, 106430), (290, 65326), (356, 53215), (367, 51620), (445, 42572), (580, 32663), (734, 25810), (890, 21286), (1468, 12905), (1780, 10643), (1835, 10324), (2581, 7340), (3670, 5162)]