19899243

素因数分解:

$3^3\times 7^2\times {\mathrm{13}}^2\times {\mathrm{89}}^1$

素因数の和:138

約数の個数: 72

約数和(自身を含む): 37551600

約数和(自身を除く): 17652357

約数列:

[1, 3, 7, 9, 13, 21, 27, 39, 49, 63, 89, 91, 117, 147, 169, 189, 267, 273, 351, 441, 507, 623, 637, 801, 819, 1157, 1183, 1323, 1521, 1869, 1911, 2403, 2457, 3471, 3549, 4361, 4563, 5607, 5733, 8099, 8281, 10413, 10647, 13083, 15041, 16821, 17199, 24297, 24843, 31239, 31941, 39249, 45123, 56693, 72891, 74529, 105287, 117747, 135369, 170079, 218673, 223587, 315861, 406107, 510237, 737009, 947583, 1530711, 2211027, 2842749, 6633081, 19899243]

約数ペア:

[(1, 19899243), (3, 6633081), (7, 2842749), (9, 2211027), (13, 1530711), (21, 947583), (27, 737009), (39, 510237), (49, 406107), (63, 315861), (89, 223587), (91, 218673), (117, 170079), (147, 135369), (169, 117747), (189, 105287), (267, 74529), (273, 72891), (351, 56693), (441, 45123), (507, 39249), (623, 31941), (637, 31239), (801, 24843), (819, 24297), (1157, 17199), (1183, 16821), (1323, 15041), (1521, 13083), (1869, 10647), (1911, 10413), (2403, 8281), (2457, 8099), (3471, 5733), (3549, 5607), (4361, 4563)]