210397780

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^2\times {\mathrm{89}}^1\times {\mathrm{409}}^1$

素因数の和:541

約数の個数: 72

約数和(自身を含む): 475788600

約数和(自身を除く): 265390820

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 89, 170, 178, 289, 340, 356, 409, 445, 578, 818, 890, 1156, 1445, 1513, 1636, 1780, 2045, 2890, 3026, 4090, 5780, 6052, 6953, 7565, 8180, 13906, 15130, 25721, 27812, 30260, 34765, 36401, 51442, 69530, 72802, 102884, 118201, 128605, 139060, 145604, 182005, 236402, 257210, 364010, 472804, 514420, 591005, 618817, 728020, 1182010, 1237634, 2364020, 2475268, 3094085, 6188170, 10519889, 12376340, 21039778, 42079556, 52599445, 105198890, 210397780]

約数ペア:

[(1, 210397780), (2, 105198890), (4, 52599445), (5, 42079556), (10, 21039778), (17, 12376340), (20, 10519889), (34, 6188170), (68, 3094085), (85, 2475268), (89, 2364020), (170, 1237634), (178, 1182010), (289, 728020), (340, 618817), (356, 591005), (409, 514420), (445, 472804), (578, 364010), (818, 257210), (890, 236402), (1156, 182005), (1445, 145604), (1513, 139060), (1636, 128605), (1780, 118201), (2045, 102884), (2890, 72802), (3026, 69530), (4090, 51442), (5780, 36401), (6052, 34765), (6953, 30260), (7565, 27812), (8180, 25721), (13906, 15130)]