19984950

素因数分解:

$2^1\times 3^2\times 5^2\times {\mathrm{89}}^1\times {\mathrm{499}}^1$

素因数の和:606

約数の個数: 72

約数和(自身を含む): 54405000

約数和(自身を除く): 34420050

約数列:

[1, 2, 3, 5, 6, 9, 10, 15, 18, 25, 30, 45, 50, 75, 89, 90, 150, 178, 225, 267, 445, 450, 499, 534, 801, 890, 998, 1335, 1497, 1602, 2225, 2495, 2670, 2994, 4005, 4450, 4491, 4990, 6675, 7485, 8010, 8982, 12475, 13350, 14970, 20025, 22455, 24950, 37425, 40050, 44411, 44910, 74850, 88822, 112275, 133233, 222055, 224550, 266466, 399699, 444110, 666165, 799398, 1110275, 1332330, 1998495, 2220550, 3330825, 3996990, 6661650, 9992475, 19984950]

約数ペア:

[(1, 19984950), (2, 9992475), (3, 6661650), (5, 3996990), (6, 3330825), (9, 2220550), (10, 1998495), (15, 1332330), (18, 1110275), (25, 799398), (30, 666165), (45, 444110), (50, 399699), (75, 266466), (89, 224550), (90, 222055), (150, 133233), (178, 112275), (225, 88822), (267, 74850), (445, 44910), (450, 44411), (499, 40050), (534, 37425), (801, 24950), (890, 22455), (998, 20025), (1335, 14970), (1497, 13350), (1602, 12475), (2225, 8982), (2495, 8010), (2670, 7485), (2994, 6675), (4005, 4990), (4450, 4491)]