17721680

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1\times {\mathrm{131}}^1$

素因数の和:252

約数の個数: 80

約数和(自身を含む): 44193600

約数和(自身を除く): 26471920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 89, 95, 131, 152, 178, 190, 262, 304, 356, 380, 445, 524, 655, 712, 760, 890, 1048, 1310, 1424, 1520, 1691, 1780, 2096, 2489, 2620, 3382, 3560, 4978, 5240, 6764, 7120, 8455, 9956, 10480, 11659, 12445, 13528, 16910, 19912, 23318, 24890, 27056, 33820, 39824, 46636, 49780, 58295, 67640, 93272, 99560, 116590, 135280, 186544, 199120, 221521, 233180, 443042, 466360, 886084, 932720, 1107605, 1772168, 2215210, 3544336, 4430420, 8860840, 17721680]

約数ペア:

[(1, 17721680), (2, 8860840), (4, 4430420), (5, 3544336), (8, 2215210), (10, 1772168), (16, 1107605), (19, 932720), (20, 886084), (38, 466360), (40, 443042), (76, 233180), (80, 221521), (89, 199120), (95, 186544), (131, 135280), (152, 116590), (178, 99560), (190, 93272), (262, 67640), (304, 58295), (356, 49780), (380, 46636), (445, 39824), (524, 33820), (655, 27056), (712, 24890), (760, 23318), (890, 19912), (1048, 16910), (1310, 13528), (1424, 12445), (1520, 11659), (1691, 10480), (1780, 9956), (2096, 8455), (2489, 7120), (2620, 6764), (3382, 5240), (3560, 4978)]