20290100

素因数分解:

$2^2\times 5^2\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{181}}^1$

素因数の和:273

約数の個数: 72

約数和(自身を含む): 47392800

約数和(自身を除く): 27102700

約数列:

[1, 2, 4, 5, 10, 19, 20, 25, 38, 50, 59, 76, 95, 100, 118, 181, 190, 236, 295, 362, 380, 475, 590, 724, 905, 950, 1121, 1180, 1475, 1810, 1900, 2242, 2950, 3439, 3620, 4484, 4525, 5605, 5900, 6878, 9050, 10679, 11210, 13756, 17195, 18100, 21358, 22420, 28025, 34390, 42716, 53395, 56050, 68780, 85975, 106790, 112100, 171950, 202901, 213580, 266975, 343900, 405802, 533950, 811604, 1014505, 1067900, 2029010, 4058020, 5072525, 10145050, 20290100]

約数ペア:

[(1, 20290100), (2, 10145050), (4, 5072525), (5, 4058020), (10, 2029010), (19, 1067900), (20, 1014505), (25, 811604), (38, 533950), (50, 405802), (59, 343900), (76, 266975), (95, 213580), (100, 202901), (118, 171950), (181, 112100), (190, 106790), (236, 85975), (295, 68780), (362, 56050), (380, 53395), (475, 42716), (590, 34390), (724, 28025), (905, 22420), (950, 21358), (1121, 18100), (1180, 17195), (1475, 13756), (1810, 11210), (1900, 10679), (2242, 9050), (2950, 6878), (3439, 5900), (3620, 5605), (4484, 4525)]